Alfa Romeo Tipo B identification

Can anyone identify the 2 seater Alfa Romeo Tipo B which Matt Grist drove at VSCC Snetterton last weekend? It would seem that they no longer have the ex Charlie Martin/David Black car and this car is clearly different.
Presumably it's not the ex Mille Miglia winner (5001) which I assume is still in the States with Greg Whitten.

I wasn't there myself so cannot supply a photo though there are some on the VSCC website.

The only other two-seater I have is chassis '50009' which was built from spares in the 1980s by Rodney Felton. The last time I saw that car, it was in the UK.

The last time I saw that car it had been returned to single seat configuration and was owned by Alan Rippon. I think it ran at VSCC Shelsley this year so I don't think it is that car but things can change very quickly.

DVLA is notoriously unreliable about events that took place well before the DVLC was set up in the mid 1960s, and could also be confused by a 1934 car with a 1950s registration number.

764 XUY is one of the newly issued 'age-related' numbers; if the registration details are showing a date of first registration as May 2011, that would suggest that the car has not previously been registered in the UK (rather than the number being issued due to a 'cherished number' transfer)... which suggests either a recent import into the UK, or a build-up from parts never previously existing as a car...

764 XUY is one of the newly issued 'age-related' numbers; if the registration details are showing a date of first registration as May 2011, that would suggest that the car has not previously been registered in the UK (rather than the number being issued due to a 'cherished number' transfer)... which suggests either a recent import into the UK, or a build-up from parts never previously existing as a car...

Unreliable, as I said.If the DVLA thinks that the digit-before-letter 1950s style is appropriately "age-related" for a 1930s car, nobody "out here" would.